[Plugin: Members] How to let new user role create_users except Super-Admin role?

Specifically, I’m attempting to give this “Manager” user role the capability to create new users. Everything I’ve tried thus far allows them to create new administrator roles, which kind of defeats the point.)

How can I resolve this issue or go about editing the code so that this new “Manager” role is unable to create a new user and assign them with “Administrative” privileges?